Move torrent storages one by one

src/base/bittorrent/session.h

@@ -96,6 +96,8 @@ namespace BitTorrent
     class TrackerEntry;
     struct CreateTorrentParams;
 
+    enum class MoveStorageMode;
+
     // Using `Q_ENUM_NS()` without a wrapper namespace in our case is not advised
     // since `Q_NAMESPACE` cannot be used when the same namespace resides at different files.
     // https://www.kdab.com/new-qt-5-8-meta-object-support-namespaces/#comment-143779
@@ -461,6 +463,8 @@ namespace BitTorrent
         void handleTorrentTrackerWarning(TorrentHandle *const torrent, const QString &trackerUrl);
         void handleTorrentTrackerError(TorrentHandle *const torrent, const QString &trackerUrl);
 
+        bool addMoveTorrentStorageJob(TorrentHandle *torrent, const QString &newPath, MoveStorageMode mode);
+
     signals:
         void addTorrentFailed(const QString &error);
         void allTorrentsFinished();
@@ -514,6 +518,13 @@ namespace BitTorrent
         void networkConfigurationChange(const QNetworkConfiguration &);
 
     private:
+        struct MoveStorageJob
+        {
+            TorrentHandle *torrent;
+            QString path;
+            MoveStorageMode mode;
+        };
+
         struct RemovingTorrentData
         {
             QString name;
@@ -582,6 +593,8 @@ namespace BitTorrent
 #if (LIBTORRENT_VERSION_NUM >= 10200)
         void handleAlertsDroppedAlert(const lt::alerts_dropped_alert *p) const;
 #endif
+        void handleStorageMovedAlert(const lt::storage_moved_alert *p);
+        void handleStorageMovedFailedAlert(const lt::storage_moved_failed_alert *p);
 
         void createTorrentHandle(const lt::torrent_handle &nativeHandle);
 
@@ -591,6 +604,9 @@ namespace BitTorrent
 
         std::vector<lt::alert *> getPendingAlerts(lt::time_duration time = lt::time_duration::zero()) const;
 
+        void moveTorrentStorage(const MoveStorageJob &job) const;
+        void handleMoveTorrentStorageJobFinished(const QString &errorMessage = {});
+
         // BitTorrent
         lt::session *m_nativeSession = nullptr;
 
@@ -731,6 +747,8 @@ namespace BitTorrent
 
         QNetworkConfigurationManager *m_networkManager = nullptr;
 
+        QList<MoveStorageJob> m_moveStorageQueue;
+
         static Session *m_instance;
     };
 }